By Breaking Celebrity News Staff

Sarah Jessica Parker is used to being the center of attention with her striking fashion statements, but all eyes were on Christina Hendricks on Monday night thanks to her blockbuster sized bust.

The Mad Men star was supposed to play second fiddle at the New York premiere of Parker's new movie, I Don't Know How She Does It, but a low-cut Vivienne Westwood gown that barely covered Hendrick's cleavage ensured that she completely overshadowed the petite Sex and the City actress in every way.

In a sharp contrast to 36-year-old Hendrick's figure-hugging satin gown that showcased her best assets, Parker, 46, wore a conservative but elegant long black dress that didn't capture anyone's attention.

The women both star in the new comedy, I Don't Know How She Does It, with Sarah Jessica playing the lead role of Kate Reddy, a finance executive who juggles a high pressure job while looking after her two children, and Christina playing the back-up role of Allison Henderson.